Nail



F. C. OVERBURY.

NAIL.

APPLICATION FILED JULY 24, 1920.

Patented Mar. 21, 1922.

rff gize 7 use.

iv.:., HILLSDi LE,

uZZ m omit may concern Be it known that l, Fiisosiuon C. Ever.- ncs'r, u citizen of the United Sfziies residing liillsduie, in he county of :lic of '3? Jersey Li 3 invent-e us ful improvements in Neils, of

owing a specification.

haying prepared roofing on foundations ncrere or Portland cement, such as om nies required in certain types of 'onsiruciion, considerable diflioulty is exod in securing the sheet roofing in nails or screws, are ordinarily employer they become loose 1 or which they hich d1 ed. he present inveni has for its object, therefore, to produce a nail or fastening, which may he driven by means of hammer through ihe sheet of roofins' into the concrete foundation, and which is so formed :ilmt it may be rotuied through a. short are cl; itself in place. the accompanying drawing,

represcnfs side View of a nail the invention.

illustrates the nail,

1 are emoiov 1' when seen i i lcrenl; angle.

ure 3-, represents a perspective view of the nail.

Figure shows 11 concrete foundation and a sheet of roofing material in section, and illustruies the nail in fixed position.

My improved nail may be made of wire, and it has o cylindrical shank 10,terminuting at its upper end in a head 11, ha vmg e narrow groove or slot 12, into which the md of u screw driver may be inserted for the purpose of partially refusing the nail. The head is preferably fist as shown.

e lower end of the shank is tapered, to

is orrics- Specification of Letters Eatenr. Patented 11 21, 1922 Application filed July 24, 1920.

Scial No. 398,883.

provide two converging fiat faces l3, 13, which meet to form a sharp edge 14, and the thus flattened end, when seen in face View, as in Figure l, is shaped somewhat like a spearhead, with the converging side edges 15, the recesses 16, and the abrupt lateral or transverse thick shoulders 17. A poini is formed at the convergence of the [int faces 13 and the edges 15, which-may he either angular or rounded, as Shown. A

In using the nail, the following procedure is preferably followed. The cement foundation is poured or laid as at 20, and, just before is finally sets to a hard mass,- and while it is still to some extent green, the sheets 21 of'asplmlt-seturated gindcooted fibrous roofing are laid thereon. The}: the

nails are driven, by means of a hanim'eg- A screw driver is' inserted latter sets solid, she nail is held rigidly in position.

What 1 claim is:

A nail consistin of a non-threaded shank formed at one em with a slotted head, and having at its other end downwardly converging forces with downwardly converging side edges and abrupt lateral shoulders pro-' jecting' beyond the shank, substantially as described.

In testimony whereof I have afiixed my signature.

rssosurciio ovEeeURY. 

